tests/pools/cluster/fixed.test.js

   1 const expect = require('expect')
   2 const { FixedClusterPool } = require('../../../lib/index')
   3 const TestUtils = require('../../test-utils')
   4 const numberOfWorkers = 10
   5 const maxTasks = 500
   6 const pool = new FixedClusterPool(
   7   numberOfWorkers,
   8   './tests/worker-files/cluster/testWorker.js',
   9   {
  10     errorHandler: e => console.error(e)
  11   }
  12 )
  13 const emptyPool = new FixedClusterPool(
  14   1,
  15   './tests/worker-files/cluster/emptyWorker.js'
  16 )
  17 const echoPool = new FixedClusterPool(
  18   1,
  19   './tests/worker-files/cluster/echoWorker.js'
  20 )
  21 const errorPool = new FixedClusterPool(
  22   1,
  23   './tests/worker-files/cluster/errorWorker.js',
  24   {
  25     errorHandler: e => console.error(e)
  26   }
  27 )
  28
  29 const asyncErrorPool = new FixedClusterPool(
  30   1,
  31   './tests/worker-files/cluster/asyncErrorWorker.js',
  32   {
  33     onlineHandler: () => console.log('worker is online')
  34   }
  35 )
  36 const asyncPool = new FixedClusterPool(
  37   1,
  38   './tests/worker-files/cluster/asyncWorker.js',
  39   {
  40     maxTasks: maxTasks
  41   }
  42 )
  43
  44 describe('Fixed cluster pool test suite ', () => {
  45   after('Destroy all pools', async () => {
  46     // We need to clean up the resources after our test
  47     await echoPool.destroy()
  48     await asyncPool.destroy()
  49     await errorPool.destroy()
  50     await asyncErrorPool.destroy()
  51     await emptyPool.destroy()
  52   })
  53
  54   it('Choose worker round robin test', async () => {
  55     const results = new Set()
  56     for (let i = 0; i < numberOfWorkers; i++) {
  57       results.add(pool.chooseWorker().id)
  58     }
  59     expect(results.size).toBe(numberOfWorkers)
  60   })
  61
  62   it('Verify that the function is executed in a worker cluster', async () => {
  63     const result = await pool.execute({ test: 'test' })
  64     expect(result).toBeDefined()
  65     expect(result).toBeFalsy()
  66   })
  67
  68   it('Verify that is possible to invoke the execute method without input', async () => {
  69     const result = await pool.execute()
  70     expect(result).toBeDefined()
  71     expect(result).toBeFalsy()
  72   })
  73
  74   it('Verify that is possible to have a worker that return undefined', async () => {
  75     const result = await emptyPool.execute()
  76     expect(result).toBeFalsy()
  77   })
  78
  79   it('Verify that data are sent to the worker correctly', async () => {
  80     const data = { f: 10 }
  81     const result = await echoPool.execute(data)
  82     expect(result).toBeTruthy()
  83     expect(result.f).toBe(data.f)
  84   })
  85
  86   it('Verify that error handling is working properly:sync', async () => {
  87     const data = { f: 10 }
  88     let inError
  89     try {
  90       await errorPool.execute(data)
  91     } catch (e) {
  92       inError = e
  93     }
  94     expect(inError).toBeDefined()
  95     expect(typeof inError === 'string').toBeTruthy()
  96     expect(inError).toBe('Error Message from ClusterWorker')
  97   })
  98
  99   it('Verify that error handling is working properly:async', async () => {
 100     const data = { f: 10 }
 101     let inError
 102     try {
 103       await asyncErrorPool.execute(data)
 104     } catch (e) {
 105       inError = e
 106     }
 107     expect(inError).toBeDefined()
 108     expect(typeof inError === 'string').toBeTruthy()
 109     expect(inError).toBe('Error Message from ClusterWorker:async')
 110   })
 111
 112   it('Verify that async function is working properly', async () => {
 113     const data = { f: 10 }
 114     const startTime = new Date().getTime()
 115     const result = await asyncPool.execute(data)
 116     const usedTime = new Date().getTime() - startTime
 117     expect(result).toBeTruthy()
 118     expect(result.f).toBe(data.f)
 119     expect(usedTime).toBeGreaterThanOrEqual(2000)
 120   })
 121
 122   it('Verify that maxTasks is set properly', async () => {
 123     const worker = asyncPool.chooseWorker()
 124     expect(worker.getMaxListeners()).toBe(maxTasks)
 125   })
 126
 127   it('Shutdown test', async () => {
 128     const exitPromise = TestUtils.waitExits(pool, numberOfWorkers)
 129     await pool.destroy()
 130     const res = await exitPromise
 131     expect(res).toBe(numberOfWorkers)
 132   })
 133
 134   it('Should work even without opts in input', async () => {
 135     const pool1 = new FixedClusterPool(
 136       1,
 137       './tests/worker-files/cluster/testWorker.js'
 138     )
 139     const res = await pool1.execute({ test: 'test' })
 140     expect(res).toBeFalsy()
 141     // We need to clean up the resources after our test
 142     await pool1.destroy()
 143   })
 144 })